lunaix-os/debug/bg_lsdbg.c

   1 #include <klibc/stdio.h>
   2 #include <lunaix/peripheral/serial.h>
   3 #include <lunaix/syslog.h>
   4 #include <sdbg/lsdbg.h>
   5
   6 #define COM SERIAL_COM1
   7
   8 LOG_MODULE("DBG");
   9
  10 static volatile sdbg_state = 0;
  11
  12 void
  13 sdbg_printf(char* fmt, ...)
  14 {
  15     char buf[256];
  16     va_list l;
  17
  18     va_start(l, fmt);
  19
  20     size_t len = __ksprintf_internal(buf, fmt, 256, l);
  21     serial_tx_buffer(COM, buf, len);
  22
  23     va_end(l);
  24 }
  25
  26 void
  27 lunaix_sdbg_loop(isr_param* param)
  28 {
  29     char c;
  30
  31     if (sdbg_state == SDBG_STATE_WAIT_BRK) {
  32         (param)->execp->eflags &= ~(1 << 8);
  33         sdbg_state = SDBG_STATE_INSESSION;
  34         sdbg_printf("[%p:%p] Break point reached.\n",
  35                     param->execp->cs,
  36                     param->execp->eip);
  37     }
  38
  39     while (1) {
  40         c = serial_rx_byte(SERIAL_COM1);
  41         if (c == SDBG_CLNT_QUIT) {
  42             sdbg_state = SDBG_STATE_START;
  43             break;
  44         }
  45
  46         switch (c) {
  47             case SDBG_CLNT_HI:
  48                 if (sdbg_state == SDBG_STATE_START) {
  49                     sdbg_printf("[%p:%p] Session started.\n",
  50                                 param->execp->cs,
  51                                 param->execp->eip);
  52                     sdbg_state = SDBG_STATE_INSESSION;
  53                 } else {
  54                     sdbg_printf("[%p:%p] Session resumed.\n",
  55                                 param->execp->cs,
  56                                 param->execp->eip);
  57                 }
  58                 break;
  59             case SDBG_CLNT_RREG:
  60
  61                 serial_tx_buffer(SERIAL_COM1, (char*)param, sizeof(isr_param));
  62                 break;
  63             case SDBG_CLNT_STEP:
  64                 ((isr_param*)param)->execp->eflags |= (1 << 8); // set TF flags
  65                 sdbg_state = SDBG_STATE_WAIT_BRK;
  66                 return;
  67             case SDBG_CLNT_BRKP:
  68                 // the break point address
  69                 // serial_rx_buffer(SERIAL_COM1, buffer, sizeof(uintptr_t));
  70
  71                 // asm("movl %0, %%dr0" ::"r"(*((uintptr_t*)buffer)));
  72
  73                 sdbg_state = SDBG_STATE_WAIT_BRK;
  74                 return;
  75             case SDBG_CLNT_CONT:
  76                 return;
  77             default:
  78                 break;
  79         }
  80     }
  81 }